A navigation apparatus 100 includes a current position information acquisition unit (a self-position acquisition unit 42) that acquires current position information, and a travel direction determination unit (for example, a route search unit 44) that deter...

A mobile terminal with electronic compass is provided with a first housing that houses a geomagnetic sensor, a second housing connected to the first housing, with relative position thereto being variable, a state detection unit that detects a relative posi...

Control section (160) is configured to measure the azimuth of electronic device (100) on the basis of the result detected by geomagnetic sensor (120) for detecting geomagnetism, and on the basis of the result detected by motion sensor (130) for detecting m...

The present invention simplifies locking of a battery pack (12) within a cell-phone lower case (13). A battery lock member (50) has a first inclined surface that permits sliding of the battery lock member (50) in such a way that an operation of housing the...